Datasheet

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TPS60251
SLVS767C – APRIL 2007 – REVISED NOVEMBER 2007
Enable Control Register (Address: 0x00h)
ENABLE B7 B6 B5 B4 B3 B2 B1 B0
BIT NAME X ENold ENmain ENsub2 ENsub1 ENaux DM5H DM5L
Bit 6 ENold (Enable Open Lamp Detection)
1: Open Lamp Detection Enabled
0: Open Lamp Detection Disabled
Bit 5 ENmain
1: Enable Main Display LEDs (DM1-DM4)
0: Disable Main Display LEDs
Bit 4 ENsub2
1: Enable Sub Display LED 2 (DS2)
0: Disable Sub Display LED 2
Bit 3 ENsub1
1: Enable Sub Display LED 1 (DS1)
0: Disable Sub Display LED 1
Bit 2 ENaux
1: Enable Aux Display LED (DM5)
0: Disable Aux Display LED
Bits 1,0 DM5H, DM5L
DM5H DM5L
DM5 Mode and Shutdown Mode
(B1) (B0)
0 0 Shutdown mode. All outputs disabled, all internal registers set to 0x00h
0 1 Enable the IC and Group DM5 as main display with maximum current of 25mA
1 0 Enable the IC and set as Aux output with maximum current of 80mA. Dimming
steps determined by Iaux0 and Iaux1 bits.
1 1 Shutdown mode. All outputs disabled, all internal registers set to 0x00h
Sub Display Current Control Register (Address: 0x01h)
SUB DISP
B7 B6 B5 B4 B3 B2 B1 B0
CURRENT
BIT NAME X X Isub5 Isub4 Isub3 Isub2 Isub1 Isub0
Bits 5 - 0 Isub5 - Isub0 (total 64 steps)
6-Bit command (64 steps) to these bits sets the current for DS1 and DS2.
For LED currents between 0 and 1.5mA, one step = 0.1mA increment
For LED currents between 1.5 and 25.5mA, one step = 0.5mA increment
Main Display Current Control Register (Address: 0x02h)
MAIN DISP
B7 B6 B5 B4 B3 B2 B1 B0
CURRENT
BIT NAME X X Imain5 Imain4 Imain3 Imain2 Imain1 Imain0
Bits 5 - 0 Imain5 - Imain0 (total 64 steps)
6-Bit command (64 steps) to these bits sets the current for DM1-DM4.
For LED currents between 0 and 1.5mA, one step = 0.1mA increment
For LED currents between 1.5 and 25.5mA, one step = 0.5mA increment
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